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2002 mercury Sable rough idle
02-15-2016, 12:05 AM
Post: #1
2002 mercury Sable rough idle
Okay so here it is. My sable with the AX4S transmission with 180k nee filter on it, trans pan on bottom and also new gaskets on it. It also has the 3.0L Vulcon with the OHV and with the vin code of U has a bad issues with the winter particularly. For some reason with every ford tarurs and mercury sable that has the Vulcan engine has this problem. Okay sometimes the car acts fine at beginning of day when you cold start the engine. Other times it idles ver freaking rough from a cold start. Other way we get this alot is you have been driving it and the engine is all nice and warm you stop somewhere for like 10-20 minutes so the engine does cool off some while you are doing what you need to do. You go back to your car and start it up and then super rough idle. You have to rev it up a little bit sometimes but it cuts in and out while you drive for a little bit the goes back to normal. So what do you guys think we in the tarurs and sable community should do?
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02-15-2016, 12:20 AM
Post: #2
RE: 2002 mercury Sable rough idle
Hard to put an exact finger on the issue but my first guess is it's NOT that common unless the older vehicle has high miles. I mean after all, we're talking about a 15 year old engine with a quarter million miles on it, right? What can happen in 250k miles? The cam timing can be off, there could be valve issues causing low vacuum at idle, which could be due to wear or sludge build up. Then there's worn ignition parts, vac leaks due to old gaskets, tired valve springs, temp sensors starting to slip in value, and the list goes on. You can do your part with NEW (read: OEM) tune up parts, then chase down anything else that's not on the money, which may or may not be a lot of time depending on how the vehicle was maintained over the years.
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02-15-2016, 12:30 AM
Post: #3
RE: 2002 mercury Sable rough idle
Well this engine I got only has 150k transmission only has 180k but the body has 255.5k. And I have seen this and many other years makes, model, submodels, and different mileages all the way around. So really I just want to know the issue. It's only during the winter after it gets below 40 degrees Fahrenheit and it mostly only does it after a short stop after being around operation temperature. Also what does the member status me before I only had 2 stars bow I have 3? Back to the car so what do you think I should put the time into replacing one part at a time and the posting back to see if it fixes the problem?
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02-15-2016, 07:01 AM
Post: #4
RE: 2002 mercury Sable rough idle
Has the Check Engine Light came on at any time? If the light is on or came on there is likely a code or codes stored that could point you in the right direction. My suggestion would be to do a full scan, record all of the codes, post those code NUMBERS here for review, and have the computer cleared.

Thanks for using the forum,
Garner

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02-15-2016, 10:56 AM
Post: #5
RE: 2002 mercury Sable rough idle
The stars increase as your number of posts goes up.

As Garner stated, any codes will help us and and will be in storage for at least the next 50 starts. If there are no codes perhaps someone with a full function scanner can look through to see if there's a sensor that out of range enough to cause issues, although if it's only at restart and doesn't hang around long enough to set a code the guy will have to move fast to catch something before it clears up. At 255k on the body that's a pretty old fuel pump, which could be suspect. A check on the fuel pressure both resting and running will confirm.
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02-17-2016, 04:51 AM
Post: #6
RE: 2002 mercury Sable rough idle
Okay where do I get a full scan?
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02-17-2016, 11:10 AM
Post: #7
RE: 2002 mercury Sable rough idle
You will have to do some research locally. Most repair facilities with a dedcent reputation will have the right stuff and someone who has been around long enough to tell you what the info means. Let us know what they come up with. Matter of fact, write the codes down so you can post then here.
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03-08-2016, 04:25 AM
Post: #8
RE: 2002 mercury Sable rough idle
I have asked multiple mechanics with great reputations and none of them know why either but I finally got it to throw a code. I did like i have to do to get it to do its issue and well it just said that it has a misfire within the first 1000 revolutions. Autozone computer suggested that I should replace the spark plugs and wires but the spark plugs have about 8-10,000 miles on them and the wires are brand new duralast gold. So what do you guys think?
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03-08-2016, 11:37 AM
Post: #9
RE: 2002 mercury Sable rough idle
So what was the code number? Sometimes having the exact info can help.

BTW, I mentioned OEM tune up parts before and those can make a difference, especially if they call for platinum plugs ($10 each?) and you put in regular plugs. ($3 each?) There's also fuel pump pressure, when the problem is happening. It's almost impossible to diagnose an issue if it doesn't stick around long enough to see what makes a difference.
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04-28-2016, 08:52 PM (This post was last modified: 04-28-2016 08:56 PM by nathaniel1995.)
Post: #10
RE: 2002 mercury Sable rough idle
Okay so I actually got a Scanner from my brother that is a deep scanner. I have no freaking codes or test fails. The only test that fails is the Evap system. But here is all I have done and it hasn't fixed it. New Intake manifold & gaskets, Valve cover gaskets, Upper intake manifold gaskets, water pump, thermostat, coolant flush to clean green, fuel pump and strainers, in-line fuel filter, all the check valves on the fuel tank(accidently broke them during new fuel pump), new coil pack, spark plugs, and spark plug wires. None of that shit fixed it. So What you think I should do next? Replace all the computer vaccuming system under the hood or all the Evaporation system?

Sorry I didn't get the code Rupe with the temperature warming up here again where I don't get it often enough to have a code. The cylinders change which are missing just so you know. No oil on the plugs they was just burned out.
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